diff options
| author | Rajkumar Manoharan <rmanohar@qti.qualcomm.com> | 2016-08-17 21:02:53 +0530 |
|---|---|---|
| committer | Govind Singh <govinds@codeaurora.org> | 2017-01-06 15:59:05 +0530 |
| commit | 23081ef66dbc0adce5ed38abd2b8fe3e6abd05c4 (patch) | |
| tree | 94cf74dff46042dd753a26849772719bd3e9bdc2 /drivers/net | |
| parent | 613449159f179a15cf85841bda6ca778104841dd (diff) | |
ath10k: improve wake_tx_queue ops performance
txqs_lock is interfering with wake_tx_queue submitting more frames.
so queues don't get filled in and don't keep firmware/hardware busy
enough. This change helps to reduce the txqs_lock contention and
wake_tx_queue() blockage to being possible in txrx_unref().
To reduce turn around time of wake_tx_queue ops and to maintain fairness
among all txqs, the callback is updated to push first txq alone from
pending list for every wake_tx_queue call. Remaining txqs will be
processed later upon tx completion.
Below improvements are observed in push-only mode and validated on
IPQ4019 platform. With this change, in AP mode ~10Mbps increase is
observed in downlink (AP -> STA) traffic and approx. 5-10% of CPU
usage is reduced.
Major improvement is observed in 1-hop Mesh mode topology in 11ACVHT80.
Compared to Infra mode, CPU overhead is higher in Mesh mode due to path
lookup and no fast-xmit support. So reducing spin lock contention is
helping in Mesh.
TOT +change
-------- --------
TCP DL 545 Mbps 595 Mbps
TCP UL 555 Mbps 585 Mbps
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/mac.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 2a1d9fde13e7..05250afef33c 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -4100,13 +4100,29 @@ static void ath10k_mac_op_wake_tx_queue(struct ieee80211_hw *hw, { struct ath10k *ar = hw->priv; struct ath10k_txq *artxq = (void *)txq->drv_priv; + struct ieee80211_txq *f_txq; + struct ath10k_txq *f_artxq; + int ret = 0; + int max = 16; spin_lock_bh(&ar->txqs_lock); if (list_empty(&artxq->list)) list_add_tail(&artxq->list, &ar->txqs); + + f_artxq = list_first_entry(&ar->txqs, struct ath10k_txq, list); + f_txq = container_of((void *)f_artxq, struct ieee80211_txq, drv_priv); + list_del_init(&f_artxq->list); + + while (ath10k_mac_tx_can_push(hw, f_txq) && max--) { + ret = ath10k_mac_tx_push_txq(hw, f_txq); + if (ret) + break; + } + if (ret != -ENOENT) + list_add_tail(&f_artxq->list, &ar->txqs); spin_unlock_bh(&ar->txqs_lock); - ath10k_mac_tx_push_pending(ar); + ath10k_htt_tx_txq_update(hw, f_txq); ath10k_htt_tx_txq_update(hw, txq); } |